The poor old BA1337 hasn't had the best punctuality record over this winter schedule, when it has operated at all. It is like has been mentioned above, usually due to an accumulation of small delays throughout the day. Yesterdays 1337 operated the BA 754/755 LHR-BSL rtn before arriving into NCL late as the 1336 at 20:21. To be fair, the guys there had it turned around pretty quickly and was only on stand a full 37 minutes